.skill-tree-node {
    position: absolute;
    display: inline-block;
    height: 24px;
    width: 24px;
}

.skill-tree-node-image {
    position: absolute;
    display: inline-block;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.skill-tree-node-level {
    position: absolute;
    display: inline-block;
    height: 13px;
    width: 12px;
    z-index: 2;
    right: calc(-12px / 3);
    top: calc(-13px / 3);
    font-size: 8px;
    text-align: center;
    vertical-align: middle;
}
